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Assembly method of open plate in camshaft decompression mechanism

The technology of a decompression mechanism and assembly method, which is applied in the direction of valve devices, mechanical equipment, engine components, etc., can solve the problems of hardness and wear resistance reduction, affecting the performance and service life of the camshaft decompression mechanism, damage, etc., to achieve Guarantee the use performance and service life, enhance the riveting strength and reliability, and ensure the effect of assembly quality

Inactive Publication Date: 2009-02-11
TAIZHOU HONGXIANG POWER MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the former method is time-consuming, laborious and inefficient, and is not suitable for mass production. The latter method will destroy the carburized and quenched layer of the opened plate, reduce its hardness and wear resistance, and affect the performance and performance of the camshaft decompression mechanism. service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The present invention is further illustrated below by way of examples.

[0011] 1. Process eccentric stepped rivets. The eccentric distance between the body of the rivet and the center line of the neck is e=0.2mm. The basic size and material of the rivet with a body taper of 1:30 is in accordance with the conventional requirements. At the same time, the riveting hole and the camshaft of the open plate The mounting holes on the body are respectively made to have the same size as the neck of the rivet and the body.

[0012] 2. Put the neck of the rivet into the riveting hole of the opening plate, insert the rivet body into the mounting hole of the camshaft body, and turn the rivet to measure the height from the highest point of the opening plate to the base circle of the exhaust cam in the decompression mechanism by measuring the measuring tool. Any value between 1.15 and 1.30mm, pre-tighten the rivet after adjustment.

[0013] 3. Fix the rivets with a press.

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Abstract

The invention discloses an assembly method of an open plate in a camshaft decompression mechanism, wherein, the open plate is riveted onto a camshaft body by a rivet which is processed into an eccentric stepped rivet; the eccentricity of the rivet body to a neck part is e which equals to 0.1 to 0.3mm; the body is preferably provided with a taper angle, and in the assembly, the height from the highest point of the open plate to a basic circle of an exhaust cam in the decompression mechanism is controlled to be 1.15 to 1.30mm by turning the rivets and combining with the measurement of detection tools, and finally the open plate is riveted and fixed by a press. The method which is used for assembling camshaft components of gasoline engines saves time and labour, is high in production efficiency and suitable for mass production; furthermore, the method does not damage a surface hardened layer of the open plate, ensures the assembly quality as well as the service performance and the service life of the camshaft decompression mechanism.

Description

technical field [0001] The invention relates to an assembly method of an opening plate used in a camshaft decompression mechanism of a gasoline engine. Background technique [0002] The camshaft assembly of a gasoline engine has a decompression mechanism including an opening plate and an exhaust cam. During processing and assembly, the height from the highest point of the opening plate to the base circle of the exhaust cam should be strictly controlled. Usually the opening plate is riveted on the cam body by rivets. Due to the accumulated errors in the processing of the opening plate and rivets, it is difficult to meet the assembly requirements when riveted with ordinary rivets. One of the commonly used methods at present is group assembly, that is, to select and group the processed opening plates and rivets for selective assembly, and the other is to grind and correct the opening plates after assembly to ensure the above height requirements. However, the former method is t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J15/06F01L13/08
Inventor 丁红林
Owner TAIZHOU HONGXIANG POWER MACHINERY
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